Recent results from BES II psi(2S) data

摘要

Recent results on charmonia decays at BES II are reported, including the measurements of psi(2S) -> Vector-Pseucloscalar, psi(2S) -> Vector-Tensor and psi(2S) -> (KSKL0)-K-0 for a test of the pQCD "12% rule" between psi(2S) and J/psi decays; the first observations of chi(c0) -> f(0)(980)f(0)(980), chi(cJ) -> K*(892)K-0*(892)(0); and a study of the pentaquark state in psi(2S) and J/psi decays.